Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for transmitting CSI (Channel State Information) by a user equipment in a wireless access system, the method comprising: receiving configuration information including a first codebook subset restriction of a first CSI process and a second codebook subset restriction of a second CSI process; and transmitting the CSI including a RI (Rank Indicator) periodically, based on at least one of the first codebook subset restriction and the second codebook subset restriction, wherein a RI of the second CSI process is the same as a most recently reported RI of the first CSI process, wherein the first codebook subset restriction and the second codebook subset restriction are configured independently, wherein the RI of the second CSI process is restricted to a second RI value set with the second codebook subset restriction, and wherein the second RI value set with the second codebook subset restriction is always the same as a first RI value set with the first codebook subset restriction.
A user device transmits channel state information (CSI) to a base station. The device receives configuration information defining allowed precoding matrices via a "codebook subset restriction". Two sets of restrictions are used: one for a first CSI process, and a second for a second CSI process. The device transmits a Rank Indicator (RI) indicating the number of data streams to use. The RI for the second CSI process is forced to be the same as the most recently reported RI from the first CSI process. Critically, although the two codebook subset restrictions are configured independently, they both restrict to the same set of allowed RIs. The CSI transmitted is based on either of the codebook subset restrictions.
2. The method of claim 1 , wherein the first codebook subset restriction and the second codebook subset restriction are configured as a bitmap parameter.
The method for transmitting channel state information (CSI) as previously described, where the codebook subset restrictions limiting the selection of precoding matrices are defined using a bitmap parameter. Each bit in the bitmap corresponds to a specific precoding matrix, and the allowed matrices are indicated by setting the corresponding bit to 1 (or 0, depending on the implementation). This bitmap format allows for flexible and efficient representation of the precoding matrix restrictions.
3. The method of claim 1 , wherein the configuration information is transmitted using RRC (Radio Resource Control) signaling.
The method for transmitting channel state information (CSI) as previously described, where the initial configuration, including the codebook subset restrictions for precoding matrices, is transmitted from the base station to the user equipment using Radio Resource Control (RRC) signaling. RRC signaling is a standard protocol used in wireless communication systems to configure various parameters of the connection between the user device and the network.
4. The method of claim 1 , further comprising: receiving first CSI process configuration information and second CSI process configuration information through RRC (Radio Resource Control) signaling.
The method for transmitting channel state information (CSI) as previously described, where the user device receives configuration information for both the first and second CSI processes through RRC signaling. This RRC signaling carries specific parameters and settings related to how each CSI process should operate, including but not limited to the codebook subset restrictions.
5. The method of claim 1 , wherein the CSI includes at least one of the RI, a PMI (Precoding Matrix Indicator), or a CQI (Channel Quality Indicator).
The method for transmitting channel state information (CSI) as previously described, where the channel state information includes at least one of: the Rank Indicator (RI), which specifies the number of data streams; the Precoding Matrix Indicator (PMI), which indicates the preferred precoding matrix to use; or the Channel Quality Indicator (CQI), which represents the quality of the communication channel.
6. A method for receiving CSI (Channel State Information) by a base station in a wireless access system, the method transmitting configuration information including a first codebook subset restriction of a first CSI process and a second codebook subset restriction of a second CSI process; and receiving the CSI including a RI (Rank Indicator) periodically, based on at least one of the first codebook subset restriction information and the second codebook subset restriction information, wherein a RI of the second CSI process is the same as a most recently reported RI of the first CSI process, wherein the first codebook subset restriction and the second codebook subset restriction are configured independently, wherein the RI of the second CSI process is restricted to a second RI value set with the second codebook subset restriction, and wherein the second RI value set with the second codebook subset restriction is always the same as a first RI value set with the first codebook subset restriction.
A base station receives channel state information (CSI) from a user device. The base station transmits configuration information defining allowed precoding matrices via a "codebook subset restriction". Two sets of restrictions are used: one for a first CSI process, and a second for a second CSI process. The user device transmits a Rank Indicator (RI) indicating the number of data streams to use. The RI for the second CSI process is forced to be the same as the most recently reported RI from the first CSI process. Critically, although the two codebook subset restrictions are configured independently, they both restrict to the same set of allowed RIs. The CSI received is based on either of the codebook subset restrictions.
7. The method of claim 6 , wherein the first codebook subset restriction and the second codebook subset restriction are configured as a bitmap parameter.
The method for receiving channel state information (CSI) as previously described, where the codebook subset restrictions limiting the selection of precoding matrices are defined using a bitmap parameter. Each bit in the bitmap corresponds to a specific precoding matrix, and the allowed matrices are indicated by setting the corresponding bit to 1 (or 0, depending on the implementation). This bitmap format allows for flexible and efficient representation of the precoding matrix restrictions.
8. The method of claim 6 , wherein the first codebook subset restriction and the second codebook subset restriction are transmitted using RRC (Radio Resource Control) signaling.
The method for receiving channel state information (CSI) as previously described, where the codebook subset restrictions for the first and second CSI processes are transmitted from the base station to the user equipment using Radio Resource Control (RRC) signaling. RRC signaling is a standard protocol used in wireless communication systems to configure various parameters of the connection between the user device and the network.
9. The method of claim 6 , wherein the configuration information is transmitted through RRC (Radio Resource Control) signaling.
The method for receiving channel state information (CSI) as previously described, where the configuration information, which includes the codebook subset restrictions, is transmitted from the base station to the user equipment using Radio Resource Control (RRC) signaling. RRC signaling is a standard protocol used in wireless communication systems to configure various parameters of the connection between the user device and the network.
10. The method of claim 6 , wherein the CSI includes at least one of the RI, a PMI (Precoding Matrix Indicator), or a CQI (Channel Quality Indicator).
The method for receiving channel state information (CSI) as previously described, where the channel state information includes at least one of: the Rank Indicator (RI), which specifies the number of data streams; the Precoding Matrix Indicator (PMI), which indicates the preferred precoding matrix to use; or the Channel Quality Indicator (CQI), which represents the quality of the communication channel.
11. A user equipment for transmitting CSI (Channel State Information) in a wireless access system, the user equipment comprising: a RF (Radio Frequency) module; and a processor that controls the RF module to: receive configuration information including a first codebook subset restriction of a first CSI process and a second codebook subset restriction of a second CSI process; and transmit the CSI including a RI (Rank Indicator) periodically, based on at least one of the first codebook subset restriction and the second codebook subset restriction, wherein a RI of the second CSI process is the same as a most recently reported RI of the first CSI process, wherein the first codebook subset restriction and the second codebook subset restriction are configured independently, wherein the RI of the second CSI process is restricted to a second RI value set with the second codebook subset restriction, and wherein the second RI value set with the second codebook subset restriction is always the same as a first RI value set with the first codebook subset restriction.
A user device transmits channel state information (CSI) to a base station. It contains a radio frequency (RF) module and a processor. The processor controls the RF module to receive configuration information defining allowed precoding matrices via a "codebook subset restriction". Two sets of restrictions are used: one for a first CSI process, and a second for a second CSI process. The device transmits a Rank Indicator (RI) indicating the number of data streams to use. The RI for the second CSI process is forced to be the same as the most recently reported RI from the first CSI process. Critically, although the two codebook subset restrictions are configured independently, they both restrict to the same set of allowed RIs. The CSI transmitted is based on either of the codebook subset restrictions.
12. A base station for receiving CSI (Channel State Information) in a wireless access system, the base station comprising: a RF (Radio Frequency) module; and a processor that controls the RF module to: transmit configuration information including a first codebook subset restriction information of a first CSI process and a second codebook subset restriction information of a second CSI process; and receive the CSI including a RI (Rank Indicator) periodically, based on at least one of the first codebook subset restriction information and the second codebook subset restriction information, wherein a RI of the second CSI process is the same as a most recently reported RI of the first CSI process, wherein the first codebook subset restriction and the second codebook subset restriction are configured independently, wherein the RI of the second CSI process is restricted to a second RI value set with the second codebook subset restriction, and wherein the second RI value set with the second codebook subset restriction is always the same as a first RI value set with the first codebook subset restriction.
A base station receives channel state information (CSI) from a user device. It contains a radio frequency (RF) module and a processor. The processor controls the RF module to transmit configuration information defining allowed precoding matrices via a "codebook subset restriction". Two sets of restrictions are used: one for a first CSI process, and a second for a second CSI process. The user device transmits a Rank Indicator (RI) indicating the number of data streams to use. The RI for the second CSI process is forced to be the same as the most recently reported RI from the first CSI process. Critically, although the two codebook subset restrictions are configured independently, they both restrict to the same set of allowed RIs. The CSI received is based on either of the codebook subset restrictions.
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September 5, 2017
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